macromutation

(ˈmækrəʊmjuːˌteɪʃən) n (Biology) biology an abnormally great change in the characteristics of a population of animals or plants over relatively few successive generations: hypothesized in the evolutionary theory of punctuated equilibrium, which states that such populations remain stable for long periods of time and evolve into new species through sudden, drastic mutations[C20: from macro- + mutation]

mac•ro•mu•ta•tion

(ˌmæk roʊ myuˈteɪ ʃən)

n. a mutation that results in a profound change in an organism, as a change in a regulatory gene that controls the expression of many structural genes.

单词	macromutation
释义	macromutation macromutation (ˈmækrəʊmjuːˌteɪʃən) n (Biology) biology an abnormally great change in the characteristics of a population of animals or plants over relatively few successive generations: hypothesized in the evolutionary theory of punctuated equilibrium, which states that such populations remain stable for long periods of time and evolve into new species through sudden, drastic mutations[C20: from macro- + mutation] mac•ro•mu•ta•tion (ˌmæk roʊ myuˈteɪ ʃən) n. a mutation that results in a profound change in an organism, as a change in a regulatory gene that controls the expression of many structural genes. macromutation macromutation [‚mak·rə·myü′tā·shən] (genetics) Any genetic change that leads to a pronounced phenotypic alteration. macromutation macromutation the mutation of several characters simultaneously. a hypothetical, single, large mutational step, proposed in some theories of evolution.
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